The complete mitochondrial genome of a species of Cirrhipathes de Blainville, 1830 from Kauaʻi, Hawaiʻi (Hexacorallia: Antipatharia)

Abstract

This study reports the first mitogenome from the antipatharian (black coral) genus Cirrhipathes (GenBank accession number ON653414). The 20,452 bp mitochondrial genome of Cirrhipathes cf . anguina LS-2022 consists of 13 protein-coding genes, two rRNA genes, and two tRNA genes ( trnM and trnW). The mitogenome is typical of other antipatharian families, including an A + T biased (64.1%) base composition and cytochrome c oxidase subunit I ( COX1) intron with embedded homing endonuclease gene ( HEG). A phylogenetic tree based on complete mitogenome sequences of currently available antipatharians indicates Cirrhipathes cf . anguina LS-2022 is sister and closely related to Stichopathes sp. SCBUCN-8849. However, it seems unlikely that intergeneric taxa share 99.97% similarity across their complete mitogenomes, raising questions about the current taxonomy of this group. This study highlights the need for additional vouchered antipatharian species to be sequenced so phylogenetic relationships can be compared with accepted taxonomy.